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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
apply_filters( "hook_name", "what_to_filter" )
.Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
Line | Code |
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641 | function is_valid_meta_key($key) { |
642 | // skip _wp_attached_file metadata since we'll regenerate it from scratch |
643 | if ( $key == '_wp_attached_file' ) |
644 | return false; |
645 | return $key; |
646 | } |
647 |
|
648 | // give the user the option of creating new users to represent authors in the import file? |
649 | function allow_create_users() { |
650 | return apply_filters('import_allow_create_users', true); |
651 | } |
652 |
|
653 | // give the user the option of downloading and importing attached files |
654 | function allow_fetch_attachments() { |
655 | return apply_filters('import_allow_fetch_attachments', true); |
656 | } |
657 |
|
658 | function max_attachment_size() { |
659 | // can be overridden with a filter - 0 means no limit |